You may not remember the work of an artist called Hans B Erickson that was posted here on the blog about two months ago. He was working on an animation project not related with architectural visualization, but this project demanded a lot of work to create scene objects like furniture. And most of his work is available for anyone to study more about polygon modeling with Blender for furniture modeling. One of his latest tutorials is about the creation of a contemporary sofa. The model is not done yet, but we can already learn a lot about how to create a sofa with Blender.
Below you will find the two part tutorial:
And don`t forget to visit his web page, to download the models and check out more tutorials.